21895822 has 8 divisors (see below), whose sum is σ = 35370216. Its totient is φ = 10105752.

The previous prime is 21895807. The next prime is 21895829. The reversal of 21895822 is 22859812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21895829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421048 + ... + 421099.

It is an arithmetic number, because the mean of its divisors is an integer number (4421277).

Almost surely, 2^21895822 is an apocalyptic number.

21895822 is a deficient number, since it is larger than the sum of its proper divisors (13474394).

21895822 is a wasteful number, since it uses less digits than its factorization.

21895822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842162.

The product of its digits is 23040, while the sum is 37.

The square root of 21895822 is about 4679.2971694476. The cubic root of 21895822 is about 279.7609439179.

The spelling of 21895822 in words is "twenty-one million, eight hundred ninety-five thousand, eight hundred twenty-two".